| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 11 |
| # | Industry | |
|---|---|---|
| #1 | Audio-visual technology | |
| #2 | Electrical machinery and energy | |
| #3 | Machine tools | |
| #4 | Engines, pumps and turbines | |
| #5 | Machines |
| # | Technology | |
|---|---|---|
| #1 | Television | |
| #2 | Unspecified technologies | |
| #3 | Starting of combustion engines | |
| #4 | Grinding or polishing devices | |
| #5 | Electric motor controls |
| # | Name | Total Patents |
|---|---|---|
| #1 | Francis Jenkins Charles | 11 |
| Publication | Filing date | Title |
|---|---|---|
| US1525552A | Square spotlight source | |
| US1525553A | Distant motor control | |
| US1525551A | Magnetically-suspended armature | |
| US1573609A | Machine for making optical prisms | |
| US1525550A | Flexing mirror | |
| US1521191A | Prism-lens disk | |
| US1521190A | Drum lens carrier | |
| US1521192A | Electroscope picture reception | |
| US1521189A | Film reception of broadcasted pictures | |
| US1525549A | Radio-picture-frequency chopper | |
| US1521188A | Photographing oscillating sparks |